The article discusses how changes in US policies and the shift towards sustainable development are impacting the international monetary system. It questions whether the US can maintain the dollar as a key currency if it pursues protectionist policies. The researchers suggest that a multilateral monetary system may be more suitable for the future, as renewable energy sources become more important and developing countries lack financial resources for necessary investments. This shift would require cooperation among major countries to fund these investments through a mix of public and private financial institutions.